- AAll $Fe-C$ are of equal length
- BIt has sandwich type structure
- CIt was the first discovered organometallic compound
- ✓All of these

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$\mathop {\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C - C{H_2} - Cl}
\end{array}}\limits_{\left( I \right)} $ $\underset{(II)}{\mathop{\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\, \\
Cl-C{{H}_{2}}-C-H \\
\end{matrix}}}\,$
$\mathop {\begin{array}{*{20}{c}}
O \\
{||} \\
{H - C - H}
\end{array}}\limits_{\left( {III} \right)} $ $\mathop {\begin{array}{*{20}{c}}
O \\
{||} \\
{{H_3}C - C - C{H_3}}
\end{array}}\limits_{\left( {IV} \right)} $
(Atomic mass : $C =12 ; H =1 ; O =16$ )